| 181 Lichfield Road Ltd | Real estate | 2021 |
| 2906 Group Ltd | Wholesale & retail | 2026 |
| 3 Stones Limited | Wholesale & retail | 2013 |
| 360 Capital Services Ltd | Extraterritorial | 2022 |
| 360 Investment Solutions Ltd | Construction | 2022 |
| 360 Property Ltd | Construction | 2011 |
| 360 Revolution Limited | Financial services | 2018 |
| 360 Ventures Ltd | Real estate | 1961 |
| A & P Installers Ltd | Construction | 2018 |
| A D Metcalfe (Services) Limited | Manufacturing | 2009 |
| A White IT Ltd | Information & communication | 2014 |
| A&L Homes Ltd | Real estate | 2018 |
| A1 Jump & Bounce Limited | Arts & recreation | 2018 |
| A1 Skips Newport Ltd | Water & waste | 2020 |
| A1 Waste Management Ltd | Water & waste | 2020 |
| A465PROPERTY Ltd | Real estate | 2024 |
| A7 Photonics Ltd | Professional & scientific | 2025 |
| Aaron Supermarket Ltd | Wholesale & retail | 2012 |
| AB Boxing and Fitness CIC | Arts & recreation | 2018 |
| AB Group Finance Limited | Financial services | 2016 |
| ABP Gym Limited | Health & social care | 2026 |
| ABP Health and Aesthetics Ltd | Health & social care | 2026 |
| ABP Supplements Ltd | Health & social care | 2025 |
| Accessible Futures Group Ltd | Professional & scientific | 2024 |
| Accident Management Centre (Wales) Limited | Wholesale & retail | 2012 |
| Accs Investments Ltd | Real estate | 2024 |
| Acuity Hearing Limited | Health & social care | 2018 |
| Ador MII Beauty and Aesthetics Ltd | Other services | 2025 |
| Advanced Moulds Limited | Manufacturing | 1979 |
| Ae&Sons Logistics Ltd | Transport & logistics | 2024 |
| Afrosheep Animations Ltd | Information & communication | 2020 |
| AH Fleet Ltd | Transport & logistics | 2021 |
| AH Waste Services Ltd | Transport & logistics | 2019 |
| Aj's Vape Shop Ltd | Wholesale & retail | 2018 |
| Ajcl Catering Ltd | Hospitality | 2022 |
| Aj’S Trading Cards Ltd | Wholesale & retail | 2025 |
| Akiraka Industries Ltd | Information & communication | 2025 |
| Albion Imperial Limited | Information & communication | 2024 |
| Alex Cope Financial Services Ltd | Financial services | 2024 |
| Allsorts Tyres and Repairs Limited | Wholesale & retail | 2025 |
| ALN Limited | Real estate | 2022 |
| Alpack Limited | Hospitality | 2023 |
| Alpha Omega Haulage Ltd | Transport & logistics | 2019 |
| Aman Tyres Limited | Wholesale & retail | 2025 |
| Ambler-Lewis Tree Specialists Limited | Agriculture & fishing | 2014 |
| American Nails HMT Ltd | Other services | 2023 |
| Anchor Windows (Ebbw Vale) Ltd | Manufacturing | 2000 |
| Annapoornaaa Ltd | Hospitality | 2022 |
| Apex Additive Technologies Ltd | Manufacturing | 2021 |
| Apok Ltd | Administrative & support | 2025 |
| Arbor Care South Wales Ltd | Administrative & support | 2026 |
| Ardwyn Homes Ltd | Real estate | 2020 |
| Arise Global Healthcare Ltd | Health & social care | 2022 |
| ARK IT Services Ltd | Information & communication | 2017 |
| Armadillo Supplies Limited | Wholesale & retail | 2017 |
| Armoury Sign Company Ltd | Manufacturing | 2022 |
| Assure Fire Safety Limited | Professional & scientific | 2025 |
| ASZ Property Limited | Real estate | 2019 |
| Audiology Associates Limited | Health & social care | 2014 |
| Augusta Supplies Ltd. | Administrative & support | 2017 |
| AW Consult Services Ltd | Information & communication | 2026 |
| B J Seals Limited | Wholesale & retail | 2001 |
| B L Roofing (Wales) Ltd | Construction | 2017 |
| B L Roofing and Building Ebbw Vale Ltd | Construction | 2023 |
| B.E.R Consultants Limited | Professional & scientific | 2013 |
| Back ROW Property's Ltd | Real estate | 2025 |
| BAM Travel Ltd | Transport & logistics | 2023 |
| Bambina & Beyond Ltd | Arts & recreation | 2025 |
| Bamm Property Developments Ltd | Construction | 2025 |
| Bankhouse Care Ltd | Health & social care | 2015 |
| Beacon Construction Management Ltd | Construction | 2024 |
| Beaufort Bowls Club Limited | Arts & recreation | 2015 |
| Beaufort Car Sales Limited | Wholesale & retail | 2026 |
| Beaufort Colts JFC Fields & Facilities C.I.C. | Arts & recreation | 2021 |
| Beaufort Commercials Limited | Real estate | 2026 |
| Beaufort Delight Limited | Hospitality | 2025 |
| Beaufort Hill Ponds and Woodlands Preservation Society | Arts & recreation | 2006 |
| Beaufort Hill Welfare Community Hall Group Ltd | Arts & recreation | 2014 |
| Beaufort Plumbing & Heating Ltd | Construction | 2022 |
| Beauty & PMU Ltd | Other services | 2025 |
| Beddau Developments Limited | Construction | 2015 |
| Beer Stop Limited | Wholesale & retail | 2021 |
| Benchmark Live Limited | Information & communication | 2023 |
| Benndi Limited | Health & social care | 2025 |
| Bennett FOX Developments Ltd | Construction | 2026 |
| Betterment Park Sports C.I.C. | Arts & recreation | 2025 |
| Bgfm Limited | Information & communication | 2017 |
| Black Mountains Archaeology Ltd | Professional & scientific | 2017 |
| Black Mountains Geomatics Ltd | Professional & scientific | 2021 |
| Blaenau Gwent Indoor Bowls Limited | Arts & recreation | 2017 |
| Blaenau Gwent Motors Ltd | Wholesale & retail | 2026 |
| Blaenau Gwent Young Stars Ltd. | Arts & recreation | 2015 |
| Blaenavon Auto Centre Limited | Wholesale & retail | 2005 |
| Blessington Property Limited | Real estate | 2010 |
| Blinx Business Solutions Limited | Administrative & support | 2025 |
| Blue Lizard Cars Limited | Wholesale & retail | 2005 |
| Bowen Grab Hire & Recycling Ltd | Water & waste | 2025 |
| Bowen Groundworks & Utilities Limited | Construction | 2017 |
| Bread Head Ltd | Hospitality | 2025 |
| Brynmawr Hand Car Wash Limited | Wholesale & retail | 2016 |